user
Tell me how would you respond to the following request.
Design a data structure for a to-do list.

assistant
A to-do list can be represented as a data structure composed of tasks and their associated data. Each task can have several associated data points, such as the task name, task description, due date, priority level, and completion status. The data structure should have methods to add, modify, and delete tasks. Additionally, the data structure should include methods to query or sort tasks by parameters such as due date, priority, or completion status.